fixes to the calculator

public/solutions/open-source-apps/index.html

@@ -6,6 +6,9 @@
 <title>Open-Source Apps · Federated Computer</title>
 <meta name="description" content="Every app your business needs — files, email, chat, CRM, support — as integrated, managed open-source software. Unlimited users, one low price, no AI project required.">
 <meta name="theme-color" content="#001a2b">
+<link rel="icon" href="../../favicon.ico" sizes="32x32">
+<link rel="icon" href="../../favicon.svg" type="image/svg+xml">
+<link rel="apple-touch-icon" href="../../apple-touch-icon.png">
 <link rel="preconnect" href="https://fonts.googleapis.com">
 <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
 <link href="https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">